Photographic enlargement apparatus



Sept. 22, 1936. 7 w KLATT PHOTOGRAPHIC ENLARGEMENT APPARATUS OriginalFiled July 29, 1933 Patented Sept. 22, 1936 UNITED STATES PATENT OFFICEWalter Klatt, Fenerbach, near Stuttgart, Germany, assignor to ErnstLeitz Optische Werkc,

Wetzlar, Germany Original application July 29, 1933, Serial No.

682,780. Divided and this application February 17, 1934, Serial No.711,689

1 Claim.

tographic enlargement apparatus, as for instance described in myco-pending application Serial No. 682,780 filed July 29, 1933, of which5 this application is a division, and it is the principal object of myinvention to provide such an apparatus with a cam controlled automaticregulation of the objectiveto the sharpest focus.

The object of the present invention is to provide an apparatus equippedwith two segments, one of which has the form of a regulator cam whichdirectly influences the objective setting or a pin of the same equippedwith a roller to produce a real automatic adjustment for a largeenlargement of the smallest film pictures.

These and other objects and advantages of my invention will become morefully known as the description thereof proceeds, and will then be morespecifically defined in the appended claim.

In the accompanying drawing forming a material part of this disclosure:

The single figure on the drawing illustrates a fragmentary side view ofan apparatus equipped with an objective movement constructed accordingto my invention.

As illustrated, the lever arm 0 which at its outer end is pivotallysecured to a standard intermediate the ends thereof as for instancedisclosed in my co-pending application Serial No. 682,780, filed July29, 1933, and is pivoted at its inner end as at m and formed into atoothed segment a: in

mesh with a toothed segment 1 integral with a cam g, engaging the roller1' the spindle of which projects through a slot 0 in the housing e forthe objective setting indicated in broken lines at l0 and which may beof any suitable construction,

This invention relates to improvements inphowell known inthe art, anddisplacing the same against the pressure of the well known objectivecontrolling spring.

In operation, the cam 21/ under the influence of the movement of thelever arms c and a will en- 5 gage the roller 1, the spindle pin ofwhich is guided in the slot 0 of the objective setting to focus the samefor the correct enlargement of a small film negative and sensitizedmaterial holder H on, a support 2 according to the angular 10 positionsof the lever arm aggregate.

It will be understood that I have described and shcwn'the preferred formof my invention as example of the many possible ways to practicallyconstruct my invention, and that I may make 15 such changes in thegeneral arrangement and in the construction of the minor details of myinvention as come within the scope of the appended claim withoutdeparture from the spirit of my invention and the principles involved. 2

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

In an enlargement camera particularly for cinema negatives, a means forautomatically focusing 25 the camera objective in its slotted housingcomprising a pivoted arm, a segment formed atone end of said arm, a campivoted to the slotted housing for the objective setting, a segmentintegral with said cam and in mesh with the segment on said 30 arm, aroller having its spindle projecting through the slot in said housingadapted to be engaged and operated by said cam during the operationthereof according to the operation of said lever arm to focus theobjective setting within its housing accordingly.

WALTER KLATI.

